Influence of time and level of urea application on seed production of paspalum plicatulum at mt cotton, south-eastern queensland

Chadhokar P.A. and Humphreys L.R. (1973) Influence of time and level of urea application on seed production of paspalum plicatulum at mt cotton, south-eastern queensland. Australian Journal of Experimental Agriculture, 13 62: 275-283. doi:10.1071/EA9730275


Author Chadhokar P.A.
Humphreys L.R.
Title Influence of time and level of urea application on seed production of paspalum plicatulum at mt cotton, south-eastern queensland
Journal name Australian Journal of Experimental Agriculture   Check publisher's open access policy
ISSN 0816-1089
Publication date 1973-01-01
Sub-type Article (original research)
DOI 10.1071/EA9730275
Volume 13
Issue 62
Start page 275
End page 283
Total pages 9
Subject 1100 Agricultural and Biological Sciences
Abstract Five levels of urea were applied as single or split dressings in early summer, at floral initiation(about Febraury 14), or at inflorescence exsertion to Paspalumplicatulum cv. Rodds Bay grown in rows on ared-yellow podzolic soil.All components of seed yield-tiller density, tiller fertility, raceme number and seed number, and seed size-were influenced by external nitrogen supply. The effects of adequate nitrogen supply during onedevelopment phase usually persisted subsequently when differences in plant nitrogen concentration haddisappeared. Nitrogen applications during the vegetative and floral initiation stages were most influential.The efficiency of response varied from 5.6 kg additional crude seed produced per kg N at the 50 kg N ha level to 1.2 at the 400 kg N ha -' level. High levels of urea (200 or 400 kg N ha - I)induced lodging and poor recovery of seed at harvest during a wet year, accentuated moisture stress during a dry year, but improved seed viability.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 04 Oct 2016, 12:29:52 EST by System User